2/9 : 12,56 = 1/C
C= 12,56 : 2/9 = 56,52
C=2ПR
R=C/2П=56,52/6,28=9
S=ПR^2=3,14*81=254,34
ответ:254,34см
2/9 : 12,56 = 1/C
C= 12,56 : 2/9 = 56,52
C=2ПR
R=C/2П=56,52/6,28=9
S=ПR^2=3,14*81=254,34
ответ:254,34см